In this subsection, we analyze the domain gap between our Gait3D dataset and existing widely used datasets including CASIA-B [1]}, OU-LP [2]} and the recently released GREW [3]}.
Because existing datasets do not provide 3D representations, we only adopt the 2D silhouettes for gait representations in our experiments.
We adopt the GaitSet [4]} for the cross-domain experiments since it is the SOTA model-free method on the Gait3D dataset.
